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388A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

388A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 388A-384DRB is a double-row tapered roller bearing with a 2.265″ bore and 4.125″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 42,200 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy loads. The bearing comes in standard radial clearance but can also be ordered in C3, C4, or C5 clearances for specific needs.

This bearing is ideal for industrial machinery or automotive applications where high radial and thrust loads are common. Its double-row construction provides added stability and load distribution.

Weighing 3.6 lb, it’s a robust choice for demanding environments. Compliant with RoHS and REACH standards, it meets international safety requirements.

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Product Parameters

  • Part Number 388A-384DRB
  • Brand TFL
  • Size 2.265" x 4.125" x 0.864"
  • Bore Dia 2.265"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.125"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.562"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 0.864"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 1.9369"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.76"
  • Cup Frontface Backing Diameter 3.74"
  • Cage Cone Backface Clearance 0.03"
  • Dynamic Radial Load 42200 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 388A
  • Cup Part Number 384DRB
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 385
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 6280 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 3810 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 10900 lbf
  • Lubrication Required
  • Temperature Range -30° to 110 °C
  • ABEC Rating ABEC-1
  • Radial Clearance Standard (Available in C3/C4/C5)
  • RoHS Compliant
  • REACH Compliant
  • Weight 3.600 lb

Features

Structural Advantages of 388A-384DRB Bearing

388A-384DRB Bearing features a double-row tapered roller design, ideal for handling combined radial and thrust loads.
Its chrome steel construction ensures durability and resistance to wear in demanding applications.

The bearing’s dynamic radial load capacity reaches 42,200 lbf, providing reliable performance under heavy loads.
Precision tolerances on bore and outer diameters ensure smooth operation and easy installation.

With a temperature range of -30° to 110°C, 388A-384DRB Bearing performs well in varied environments.
The steel cage maintains roller alignment, reducing friction and extending service life.

Designed for standard radial clearance, it offers flexibility for different operational needs.
Its open construction allows for easy lubrication, ensuring consistent performance over time.

Application

Common Applications of 388A-384DRB Bearing
The 388A-384DRB Bearing is widely used in heavy machinery, such as construction equipment and agricultural vehicles, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability in demanding environments.

In automotive applications, 388A-384DRB Bearing supports axle systems and wheel hubs, providing reliable performance under varying load conditions. The inch sizing makes it compatible with many North American vehicle models.

For industrial conveyor systems, 388A-384DRB Bearing’s open design allows for easy lubrication, extending service life in high-load scenarios. The standard radial clearance offers flexibility for different operational needs.

Where Is 388A-384DRB Bearing Used?
You’ll often find 388A-384DRB Bearing in mining equipment, where its tapered roller design manages heavy radial and axial loads. The steel cage adds stability during prolonged use.

In wind turbine gearboxes, 388A-384DRB Bearing’s robust construction helps withstand variable wind forces. Its ABEC-1 rating ensures consistent performance without over-engineering.

Built for Heavy-Duty Use: 388A-384DRB Bearing
The 388A-384DRB Bearing excels in logging machinery, where its double-row setup distributes loads evenly. The chrome steel rollers resist wear even in gritty conditions.

For railway applications, 388A-384DRB Bearing’s temperature range (-30° to 110°C) makes it suitable for diverse climates. The standard lubrication requirement simplifies maintenance routines.

Automotive vs Aerospace: Applications of 388A-384DRB Bearing
In trucks, 388A-384DRB Bearing commonly supports differential systems, while in aircraft landing gear, its inch sizing meets specific imperial measurement requirements. The dynamic load ratings ensure safety in both sectors.

For hydraulic pumps, 388A-384DRB Bearing’s combined load capacity prevents premature failure. The open seal type facilitates regular lubrication checks.

Q&A

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